There's a W3C Web standard that is supposed to address this (Annotations), but I don't think it has gotten much traction yet: https://web.hypothes.is/blog/annot

There's a W3C Web standard that is supposed to address this (Annotations), but I don't think it has gotten much traction yet: https://web.hypothes.is/blog/annotation-is-now-a-web-standard/ https://web.hypothes.is/blog/annotation-is-now-a-web-standar...